Run format-webkit on webkitpy code (without string conversion).

third_party/WebKit/Tools/Scripts/webkitpy/tool/mocktool.py

 # Copyright (C) 2011 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #    * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #    * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 32 matching lines @@
         # object will be used. Generally speaking unit tests should
         # subclass this or provider wrapper functions that set a common
         # set of options.
         self.update(**kwargs)
 
     def update(self, **kwargs):
         self.__dict__.update(**kwargs)
         return self
 
     def ensure_value(self, key, value):
-        if getattr(self, key, None) == None:
+        if getattr(self, key, None) is None:
             self.__dict__[key] = value
         return self.__dict__[key]
 
 
 # FIXME: This should be renamed MockWebKitPatch.
 class MockTool(MockHost):
 
     def __init__(self, *args, **kwargs):
         MockHost.__init__(self, *args, **kwargs)
 
         self._deprecated_port = MockPort()
 
     def deprecated_port(self):
         return self._deprecated_port
 
     def path(self):
         return "echo"